I also think the lack of a crowd and atmosphere may play a role. My overwhelming feeling is that Yuzuru would perform much better if there is a big energized crowd , because he expends alot of emotional energy in his performances and I think he also imbibes energy from the crowd .His performances are very resonant.Probably why he was flat in worlds as the atmosphere was non existent. Nathan is a very cool customer, I always feel like he is skating to satisfy his own ambitions and attain perfection rather than anything else, so the lack of atmosphere won’t affect him as much.